Crank-arm sleeve-bearing.



PATENTED MAR. 13, 1906.

C. WALES. CRANK ARM SLEEVE BEARING.

APPLICATION TILED JULY 24.1905.

NIH

qvil'ucoaca SEW 111 5, allo tncl UNITED STATES PATENT OFFICE.

CRANK-ARM SLEEVE-BEARING.

Specification of Letters Patent.

Patented March 13, 1906.

Application filed July 24., 1905. Serial No. 271,090.

To all} whom it may concern.

Be 1t known that I, CHARLES WALES, a citizen of the United States, and a resident of Detroit, in the county of Wayne and State of Mlchlgan, have invented certain new and useful Improvements in Crank-Arm Sleeve-Bearlngs, of which the following is a specification.

This invention is in the nature of. an improved sleeve-bearing for crank or like arms.

It has heretofore been deemed necessary in the manufacture of such devices to expend a considerable amount of skilled labor and time, thereby incurring considerable expense, and such bearings having been heretofore required to be quite wide to give stability to the arm and prevent lateral wabbling and wear thereof. Furthermore, such Wide sleeve-bearings when made in more than one piece were generally threaded together, thus incurring exgense in cutting the necessary threads, &c.

uch wide bearings also required frequent oilmg or lubricating, and in cold weather especially the oil spread over the extensive surface of the bearing very often became gummy or st1c and thus prevented the free movement the parts.

The object of this invention is to provide a bearing of this class in the manufacture and use of which all of these difliculties are obviated and all of these objections removed, the

improved bearing being relieved at the center broken line 2 2 of Fig. 1, part of the arni being shown in edge elevation.

Referring specifically to the drawings, 10 indicates a sleeve which for the purposes of this specification may be denominated the interior sleeve, and 20 a sleeve "which will be designated the exterior sleeve, each of which is provided at its outer end with an annular inwardly-extending flange, as at 11 and 21, the inner edges of these flanges being the only portions of the sleeves which bear upon the shaft when the parts are assembled and mounted thereon.

The inner diameter of the interior sleeve 10 from the flange 1 1 to its opposite end is preferably the same throughout, but not necessarily so; but its outer diameter is reduced from near its mid-length, as at 12, to its opposite end, a shoulder 13 being thus formed at the point of junction of the two diameters.

The inner diameter of the exterior sleeve is of a size to permit of that sleeve being forced over the reduced portion 12 of the sleeve 10, and its outer diameter is preferably, but not necessarily, about the same as the diameter of the larger portion of the interior sleeve 10.

30 indicates a crank-arm or like device, which is preferably formed by punching or stamping out of a sheet of metal, and it is provided with an openin preferably near its larger end, as at 31, o a diameter to fit snugly and tightly on the outside of the reduced portion 12 of the sleeve 10.

To assemble the parts, the arm' 30 is slipped on the end of portion 12 of sleeve 10 and forced by driving or otherwise thereupon until it abuts the shoulder 13. The sleeve 20 is then forced by driving or otherwise upon the part 12 of sleeve 10 until its end 23 abuts the arm 30 and firmly clamps it between said end and the shoulder 13.

The interior diameters of the flanges 11 and 21 are .of a size to fit roperly upon the shaft, (not shown,) and Wiien the bearing is in place on the shaft these flanges are the only parts in contact with the shaft, thereby assuring easy movement thereon. The effect for stability and steadiness is fully equal to that of a bearing as broad as the distance of the flanges apart, while the liability of the oil to become gummy and clog on such an extended surface is avoided.

The sleeves may be turned out in quantities upon automatic lathes or screw-machines and the arms stamped or punched from a sheet at a single stroke, thus enabling the manufacturer to produce these parts quickly and rapidly at the lowest possible cost.

What I claim as new is 1. A sleeve-bearing for crank-arms, comprising an interior sleeve provided with an inwardly-projecting annularv bearing-flange at one and reduced in outer diameter toward the opposite end formin a shoulder on the outside at the junction 0 the different diameters, and an exterior sleeve also provided with an inwardly-projecting annular bearingflange at one end, its main body being of a size to permit it to be forced over the reduced portion of the interior sleeve, whereby an arm, slipped on said reduced portion, may be exterior. sleeve.

2. The comblnatlon, with an interior sleeve 4 held between the shoulder and the end of the rovided with an inwardly-projecting annu-' ar, bearing-flange at one end'and having its I outer diameter reduced toward the 0 posite end formin a shoulder on its outsi e, "of" a crank-arm "over the reduced end and resting agamst the rovide'd with a. likeinwardly=projecting ann ar bearaving :a suitable opening shoulder, and an .o exterior sleeve ing-flahge at one end forced over the reduced portion of the interior sleeve and clam ing the crank-arm between the inner end 0 the exterior sleeve 'and'said shoulder;

Witness my hand, this 19th day of July 1905; at the city. of New York, in the county and State of New York,

' I CHARLES Witnesses:

HERMAN MEYER, WILLIAM R. BAmD. 

